how to check for all true or false how many are correct answers 5/5

Question

#include <stdio.h>

int main ()
{
  int d, a;
  printf ("enter sum of 5+5\n");
  scanf ("%d", &d);

  if (d == 10)
    {
      printf ("true\n");

    }
  else
    {
      printf ("false\n");
    }

  printf ("multiple of 5*5 is ");
  scanf ("%d", &d);
  if (d == 25)
    {
      printf ("true\n");

    }
  else
    {
      printf ("false\n");
    }

  printf ("6 divided by 2 is\n");
  scanf ("%d", &d);
  if (d == 3)
    {
      printf ("true\n");

    }
  else
    {
      printf ("false\n");
    }

  printf ("sum of 18 + 18 is ");
  scanf ("%d", &d);
  if (d == 36)
    {
      printf ("true\n");

    }
  else
    {
      printf ("false\n");
    }

  printf ("multiple of 3*3 is ");
  scanf ("%d", &d);
  if (d == 9)
    {
      printf ("true\n");

    }
  else
    {
      printf ("false\n");
    }

  return 0;
}

Answer 1

You can add a new variable and keep incrementing it every time the user answers correctly.

int correctAnswers = 0;
// ...
if ([correct answer])
{
    printf("true\n");
    correctAnswers++;
}
// ...
printf("Correctly answered: %d", correctAnswers);